Mr. Marcus V. Monticelli Profile

Marcus V. Monticelli

at Lawrence Livermore National Lab

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Author

Publications (11)

Proceedings Article | 24 November 2023 Presentation + Paper

THGs for NIF operations (>2 MJ NIF operations)

Kathleen Schaffers, Christopher Stolz, John Adams, Raluca Negres, Marcus Monticelli

Proceedings Volume 12726, 1272603 (2023) https://doi.org/10.1117/12.2684120

KEYWORDS: Crystals, National Ignition Facility, Polarization, Laser induced damage, Fabrication, Shadows, Silica, Laser processing, Frequency conversion, Absorption

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Proceedings Article | 17 March 2023 Presentation

Recent laser performance improvements and latest results at the National Ignition Facility

Jean-Michel Di Nicola, Tayyab Suratwala, Lawrence Pelz, John Heebner, David Alessi, Anumeha Bhasker, Tiziana Bond, Mark Bowers, Gordon Brunton, Brandon Buckley, Alicia Calonico Soto, Wren Carr, Leyen Chang, Jason Chou, Simon Cohen, David Cross, Rich Deveno, Peter Devore, Michael Erickson, Catalin Filip, Nathan Gottesman, Apurva Gowda, Dan Kalantar, Abe Handler, Vincent Hernandez, Sandrine Herriot, Christopher Kinsella, Tom Lanier, Doug Larson, Brian MacGowan, Samuel McLaren, Ken Manes, Kathleen McCandless, Christopher Miller, Marcus Monticelli, Ryan Muir, Mario Ordonez, Alan Pao, Jordan Penner, Travis Petersen, Shahida Rana, Brett Raymond, River Aden, Nathan Ruiz, Sam Schrauth, Stanley Sommer, Mary Spaeth, Christopher Stolz, Diana VanBlarcom, Bruno Van Wonterghem, Alexander Wargo, Lei Wang, Paul Wegner, Brian Welday, Pam Whitman, Nan Wong

Proceedings Volume PC12401, PC1240103 (2023) https://doi.org/10.1117/12.2655251

KEYWORDS: National Ignition Facility, Fusion energy, Yield improvement, Space operations, Pulsed laser operation, Pulse shaping, Plasma, Neodymium glass lasers, Laser systems engineering, Laser energy

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Proceedings Article | 20 November 2019 Presentation + Paper

Damage performance of fused silica debris shield at the National Ignition Facility

Zhi Liao, C. Carr, D. Cross, C. Miller, P. Miller, M. Monticelli, B. Olejniczak, R. Raman, D. VanBlarcom, B. Welday, P. Whitman, L. Wong, T. Suratwala

Proceedings Volume 11173, 111730Y (2019) https://doi.org/10.1117/12.2536452

KEYWORDS: National Ignition Facility, Inspection, Silica, Laser optics, Particles, Diagnostics, Contamination, Laser induced damage

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Proceedings Article | 26 November 2018 Presentation

Novel AMP surface treatment for improving optical fiber strength and laser gain (Conference Presentation)

Diana VanBlarcom, Derrek Drachenberg, Marcus Monticelli, Gabriel Davalos, Steve Davis, Nick Schenkel, Matthew Cook, Robert Crist, Michael Messerly, Jay Dawson

Proceedings Volume 10805, 108051C (2018) https://doi.org/10.1117/12.2501563

KEYWORDS: Fiber lasers, Laser damage threshold, Glasses, Silica, Etching, Coating, National Ignition Facility, Amplifiers, Fiber coatings, Photonic crystals

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Contaminants can severely limit the efficiency, laser damage threshold, and strength of photonic crystal fiber-based lasers. Such contamination can occur due to environmental exposure during the pulling or stacking of rods and tubes or improper handling and storage of these glass components. A preform made by the “stack and draw” process is susceptible to incorporating surface contaminants into the bulk laser glass. We have adapted cleaning and handling protocols originally developed for processing large fused silica optics for the National Ignition Facility. The etch cleaning process reported here mimics the “AMP” or “Advanced Mitigation Process” developed for NIF optics that see high fluence 351nm light. In addition, all cleaning, fixturing and assembly processes used to prep a stack for pulling into a fiber are done in a Class 100 cleanroom. Glass rods (1-3mm in diameter and 10” long) are assembled into a Teflon fixture that only contacts the rods at each end. The loaded fixture receives 120kHz ultrasonic cleaning in 10% sodium hydroxide at 45C and 3% Brulin 1696 detergent at 55C. Parts are thoroughly rinsed using ultrasonicated ultrapure water and spray rinses. A 200nm etch in buffered hydrofluoric acid (6:1 BOE diluted 2:1 in DI water) is followed by additional ultasonicated (120kHz-270kHz) ultrapure water and spray rinse. Finally, the components are allowed to fully dry inside the Teflon frame. The rods are cleaned, stacked, and assembled into a fused silica tube. The preform stack is then returned to a non-cleanroom area to be pulled into fiber using standard telecom fiber-based draw tower equipment and without clean air filters around the draw area. Four fibers were made to test independently the damage threshold and the background loss, two Yb core active fibers and two silica core (F clad) fibers. One of each was cleaned with the AMP process, and one of each with a methanol wipe cleaning process. The active fiber was coated with a dual acrylate coating, first with a low-index inner coating to provide a pump cladding, and then with a relatively hard coating to protect the relatively soft primary coating. The active fibers were pumped at 980nm in a double Fresnel cavity configuration and the power increased until the fiber was damaged up to 1kW. The passive fiber background loss was measured using a standard cut-back technique. Replacing the former methanol wipe clean process with this aqueous cleaning process improved the 1060nm damage threshold of a fiber laser by >30x to above the kW level in the laboratory and reduced the background attenuation by >18x. Early indications are that the acid etching also makes the tensile strength of the fiber consistently high. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.

Proceedings Article | 29 November 2017 Open Access

Damage sources for the NIF Grating Debris Shield (GDS) and methods for their mitigation

C. Carr, J. Bude, P. Miller, T. Parham, P. Whitman, M. Monticelli, R. Raman, D. Cross, B. Welday, F. Ravizza, T. Suratwala, J. Davis, M. Fischer, R. Hawley, H. Lee, M. Matthews, M. Norton, M. Nostrand, D. Vanblarcom, S. Sommer

Proceedings Volume 10447, 1044702 (2017) https://doi.org/10.1117/12.2281202

KEYWORDS: Particles, National Ignition Facility, Glasses, Antireflective coatings, Silica, Laser induced damage

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Proceedings Article | 31 October 2014 Paper

Cleaning practices and facilities for the National Ignition Facility (NIF)

James Pryatel, William Gourdin, Susan Frieders, Gerald Ruble, Marcus Monticelli

Proceedings Volume 9237, 92372H (2014) https://doi.org/10.1117/12.2075927

KEYWORDS: National Ignition Facility, Particles, Metals, Mirrors, Contamination, Ultrasonics, Aluminum, Optical coatings, Natural surfaces, Nitrogen

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Proceedings Article | 31 October 2014 Open Access

Silica laser damage mechanisms, precursors, and their mitigation

J. Bude, P. Miller, N. Shen, T. Suratwala, T. Laurence, W. Steele, S. Baxamusa, L. Wong, W. Carr, D. Cross, M. Monticelli, M. Feit, G. Guss

Proceedings Volume 9237, 92370S (2014) https://doi.org/10.1117/12.2070017

KEYWORDS: Silica, Laser induced damage, Etching, Absorption, Laser damage threshold, Surface finishing, Atrial fibrillation, Glasses, Temperature metrology, National Ignition Facility

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Proceedings Article | 19 February 2011 Paper

Programmable beam spatial shaping system for the National Ignition Facility

John Heebner, Michael Borden, Phil Miller, Steve Hunter, Kim Christensen, Michael Scanlan, Chris Haynam, Paul Wegner, Mark Hermann, Gordon Brunton, Eddy Tse, Abdul Awwal, Nan Wong, Lynn Seppala, Mark Franks, Ed Marley, Kevin Williams, Tracy Budge, Mark Henesian, Christopher Stolz, Tayyab Suratwala, Marcus Monticelli, Dan Walmer, Sham Dixit, Clay Widmayer, Justin Wolfe, Jeff Bude, Kelly McCarty, Jean-Michel DiNicola

Proceedings Volume 7916, 79160H (2011) https://doi.org/10.1117/12.875794

KEYWORDS: National Ignition Facility, Liquid crystals, Beam shaping, Liquid crystal on silicon, Laser systems engineering, Optical amplifiers, Light valves, Silicon, Oxides, Relays

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Proceedings Article | 2 December 2010 Paper

Determination of laser damage initiation probability and growth on fused silica scratches

Mary Norton, C. Wren Carr, David Cross, Raluca Negres, Jeffrey Bude, William Steele, Marcus Monticelli, Tayyab Suratwala

Proceedings Volume 7842, 784218 (2010) https://doi.org/10.1117/12.867734

KEYWORDS: Silica, Laser induced damage, Amplifiers, Etching, Laser optics, Photomicroscopy, Laser development, Optics manufacturing, Optical components, Laser systems engineering

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Proceedings Article | 2 December 2010 Paper

A programmable beam shaping system for tailoring the profile of high fluence laser beams

John Heebner, Michael Borden, Phil Miller, Chris Stolz, Tayyab Suratwala, Paul Wegner, Mark Hermann, Mark Henesian, Christopher Haynam, Steve Hunter, Kim Christensen, Nan Wong, Lynn Seppala, Gordon Brunton, Eddy Tse, Abdul Awwal, Mark Franks, Ed Marley, Kevin Williams, Michael Scanlan, Tracy Budge, Marcus Monticelli, Dan Walmer, Sham Dixit, Clay Widmayer, Justin Wolfe, Jeff Bude, Kelly McCarty, Jean-Michel DiNicola

Proceedings Volume 7842, 78421C (2010) https://doi.org/10.1117/12.867728

KEYWORDS: Adaptive optics, Beam shaping, Liquid crystals, Liquid crystal on silicon, Light valves, Modulation, Wavefront distortions, National Ignition Facility, Custom fabrication, Fusion energy

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Proceedings Article | 30 December 2008 Paper

The HMDS coating flaw removal tool

M. Monticelli, M. Nostrand, N. Mehta, L. Kegelmeyer, Mike Johnson, J. Fair, C. Widmayer

Proceedings Volume 7132, 71320V (2008) https://doi.org/10.1117/12.804458

KEYWORDS: Coating, Head-mounted displays, Modulation, National Ignition Facility, Geometrical optics, Head, Particles, Laser induced damage, Confocal microscopy, Laser optics

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Showing 5 of 11 publications

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